Current status : PS4 Skyrim SE with Dead Thrall overhaul that allows thralling of people , creatures , and undead with very few exceptions.
Wander the wilds with a Nightlord Vampire , Giant , Saber Cat , or Lurker as thralls that will last for a good while and not turn to ash.
Issues of permanency still same so save up those notes and letters , sell to your spouse or favorite vendor , and reacquire the ones that dont vanish from store inventory.
Currently have Red Eagle{anchored} and also 2 Deathlords(from the dragr pit in the 2nd Potema quest) that seem permanent without anchoring. pls note i have carefully avoided reigniting the Red Eagle quest line but i think Potema`s Catacombs doesn`t respawn.
Also have the Nightlord Vampire{a talker) who possessed Potema`s Key anchored with a Letter from a Friend and so far she is sticking as is an anchored Nightmaster{moans} who was the radiant objective of a Dawnguard quest to a non-vamp location.
Permanent Briarheart from that gold mine in the Reach.
Weird highlights so far-
Fastred { permanent corpse} was killed by a dragon in Ripten after she followed her boyfriend there.
i took her body to my cellar at Lakeview Manor wher she remained for many moons until one day I enter the home to discover her alive and heading back to work the streets in that city of sin.
Also a dragr was found same location different time but i suspect he was an unnamed respawn of one of the Galdursen brothers who had disappeared from storage after a futile attempt to anchor them past the end of their quest.